Bailer dump bottom



Nov. 26, 1940; L. D. MOWREY BAILER DUMP BOTTOM Filed July 15, 1938 i 8 7 6 y m l l B Till I'IIIII'I IN VENTOR.

ATTORNEY.

f 1 44, 1 1. i. w w mm mnu Lester D. Mowre ey Patented Nov. 26, 1940 UNITED STATES.

PATENT OFFIC '7 Claims.

This invention relates to an improvement in bailer dump bottoms for use in connection with tubular bailers of the type used in oil and other deep wells. It is customary to use a. tubular bucket for the conveying of cement and other liquids to positions in lower portions of a Well oradjacent the bottom, where such liquids are discharged by means of a dumping attachment at the bottom of the bucket.

Various types of bailer dump bottoms have been suggested heretofore for use in connection with these tubular buckets, but they have not "been satisfactory for manufacture or for. operation due to theircomplexity in structure and difficulty of use.

The principal object of this invention is to improve the construction and thepmanner of use of the bailer bottom which will allow a bailer bucket full of liquid to be lowered to a point adjacent the bottom of the well and the material dumped therefrom and which bailer dump bottom will be held open until it is withdrawn from the well.

A further object of'the invention is to prevent the opening of the bailer dump bottom by gas pressure while the bailer bucket is being lowered into the well, by the provision of a spring acting on a valve which tends to hold the latter seated and against accidental opening.

Another object of the invention is to provide for the closing of the valve of the bailer dump bottom without the necessity of removing it from the bailer. I

Still another object of the invention is to provide for ready interchangeability of the bailer bottom for the removal of slush from the bottom of the well by the bailer.

In carrying out these objects of the invention,

the invention is illustrated in a preferred embodi-.

ment thereof, in the accompanying drawing, in

dump bottom removed from the bucket and showing the valve in open position.

The invention is illustrated in the accompany- 55 ing drawing in connection with a bailer bhcket of the usual or conventional type which is designated generally by the numeral 5 and which is long and tubular being adapted to be lowered into a deep well for raising or lowering liquids relative thereto.

At the lower end of the bailer bucket, a bailer dump bottom is provided to control the discharge from the bucket. The improved bottom embodying this invention includes a housing 6, the upper end of which is reduced in diameter at I and is 10 externally screw-threaded for detachable connection with thelower end of the bailer 5, being screwed therein and capable of removal. The reduced portion I has an annular groove 8 in the periphery thereof to be engaged by a set screw 9, l5

screw-threaded through the wall of the bailer 5 to prevent accidental unscrewing of the bailer bottom therefrom. To facilitate the unscrewing of the bailer bottom, holes ID are provided in opposite sides thereof as shown inFig. 3 for the in- .20 sertion of a bar to provide for turning thereof relative to the bailer bucket.

The upper end of the body portion 6 is provided with a valve seat II in positionto be engaged by a valve I2 adapted to seat thereon, Y. which valve I2 is carried by a valve stem I3, extending longitudinally through the casing 6 to a point below the same and having a connection or coupling I4 screw-threaded or otherwise connected with the lower end portion of said valve 30 stem.

A coiled spring I5 is sleeved overthe valve stem I3 and is interposed between the coupling I4 and the lower end portion of the casing 6, normally I tending to hold the valve I2 seated, but capable 35 of compression to permit unseating of the valve, as shown in Fig. 4.

Secured to opposite sides of the valve stem l3 are spring detents I6, each being formed of a leaf spring secured at one end to a side of the valve stem I3 with its opposite end free and normally tending to flex outwardly away from the valve stem. The free ends of the detents I 6 are received and guided in grooves or channels I! in opposite sides of the casing 6 in positions to engage notches I8 formed in the outer sides of the channels in positions to be engaged by the detents I6 when the valve I2 is unseated and raised to its upper position, as shown in Fig. 4, whereby the valve will be held open. Immediately over the notches I8 are screw-threaded openings IQ through which screws 20 may be inserted to enage the detents I6 and release the same from the notches I8. Other pins or engaging elements 55,

may be inserted through the openings 19 for this purpose, if desired, but the screws may be inserted independently and hold the detents disengaged until both are released and the valve seats by the action of the spring l5 thereon.

If it is desired to introduce and dump a liquid, such as liquid cement, water, or acid, at a point substantially above the bottom of the well, an extension 2| may be screwed into the lower end of the coupling M to engage with the bottom of the well when the dump bottom is spaced at the point thereabove.

The bailer dump bottom is particularly useful ,having a valve seat therein, a valve in position when lowering water for drilling with standard or the desired point and dumped, washing the sediment and sludge downward from the walls of. the Well. If it is desired to dump directly in,the'bot-' tom of the well, the extension 2! may be removed and the dumping caused by the engagement of the coupling M or lower end of the valve stem I3 directly with the bottom of the well. 7

As the bailer with its bottom is lowered into the well, this lowering action continues until its lowermost extremity engages the bottom of the well, which forces the valve stem I l upwardly against the tension of the spring I5 relative to the bailer and its bailer bottom, unseating the valve 112 sliding the detents l6 along the grooves l'l until they engage the notches l8. This looks the 'valve l2 open and holds it open during the discharge of the liquid from within the bailer 5, out through openings 22 in opposite sides of the casing 6, allowing complete removal of all of the liquid from within the bailer.

These detents also holdthe valve unseated and open during the removal of the bailer bucket from the well, which prevents accidental withdrawing of any of the liquid from within the well in the removal of the bailer therefrom. After the bailer has been removed from the well, the valve may be easily reseated by screwing screws 2|} into the 45 openings l9 until the detents [6 are disengaged from the notches [8 when the valve will close by the action of the spring I 5 on its valve stem.

The spring l5 prevents the valve from opening accidentally under the high pressure of the gas 50 within the well while the bailer is being lowered therein. This is particularly important when introducing acids into a well for acidizing producing formations or for the introduction of cement into the bottom of the well. Heretofore, the in- 55 troduction of liquids into the well by the usual bailers provided has been quite difficult and impractical.

The ready attachment of the bailer bottom with the bailer enables this to be removed when so desired and interchanged with a bailer bottom, capable of removing slush from the bottom of the well when desired. I claim:

1. A bailer dump bottom comprising a casing 65 having a valve seat therein and having shoulders in different sides thereof spaced equal distances from the valve seat, a valve in position to engage said seat, a valve stem connected with said valve, resilient means acting on the valve stem normally 70 tending to press the valve toward its seat, and resilient members directed laterally of the valve stemin different directions with the inner ends secured thereto and the outer ends in positions to engage the shoulders for holding said valve 75 unseated.

spudder tools. The bailer 5 may be filled with water while at the top of the Well and lowered to 2. A bailer dump bottom comprising a casing having a valve seat therein and having shoulders in different sides thereof spaced equal distances from the valve seat, a valve in position to engage said seat, a valve stem connected with the valve, resilient means acting on the valve stem normally tending to press the valve toward its seat, and spring members of equal lengths directed laterally from the valve stem with the inner ends secured thereto and in positions to engage the shoulders at the free ends of said members for holding the valve unseated.

3. A bailer dump bottom comprising a casing to engagesaid seat, a valve stem connected with said valve, resilient means acting on the valve stem normally tending to press the valve toward its seat, a detent connected with a side of the valve stem and extending laterally therefrom, said casing having a groove therein receiving the detent' for, longitudinal sliding movement relative thereto, and meansfor engaging the detent to hold the valve unseated. 4. A bailer dump bottom comprising a casing having means for connection with a bailer and having a valve seat therein, a valve in position to engage the seat and control discharge from the bailer, a valve stem connected With said valve, spring detents attached to the valve stem and extending laterally therefrom, said casing having longitudinalguides on the inner side thereof slidably receiving said detents, and notches in said guides in position to be engaged by the detents upon open position of the valve to hold said valve open.

5. A bailer dump bottom comprisin a casing having means for connection with a bailer and having a valve seat therein, a valve in position to engage the seat and control discharge from the bailer, spring detents attached to the valve and extending laterally therefrom, notches in said casing in positions to be engaged by the detents upon open position of the valve to hold said valve open, resilient means connected with the valve and normally tending to close the valve, and means for detaching the detents from the notches to provide for seating of the valve by said resilient means.

6. A bailer dump bottom comprising a casing having means for connection with a bailer and having a valve seat therein, a valve in position to engage the seat and control discharge from the bailer, a valve stem connected with said valve, spring detents attached to the valve stem and extending laterally therefrom, said casing having guides on the inner side thereof slidably receiving said detents, notches in said guides in position to be engaged by the detents upon open position of the valve to hold said valve open, resilient means connected with the valve stem normally tending to press the valve closed, and means for detaching the detents from the notches to provide for seating of the valve by said resilient means.

7. A bailer dump bottom comprising a casing havingmeans for connection with a bailer, and having a valve seat therein, a valve in position to engage the valve seat, a valve stem connected with the valve and projecting through the casing and outwardly thereof, a coiled spring sleeved over said valve stem and interposed between said stem and said casing normally tending to move the valve to seating position, leaf springs on dif ferent sides of the valve stem and each having one end attached thereto and the opposite end reunseated tohold said valve away from its seat, siliently pressing laterally from the valve stem, said casing having openings through the sides said casing having grooves therein receiving the thereof above the notches, and means for inserlast-mentioned ends of the leaf springs and havtion through said openings to disengage the leaf ing notches in the grooves in positions for ensprings from the notches.

gagement by the leaf springs when the valve is LESTER D. MOWREY. 

